Sony HAP-Z1ES + MacBookPro


Love my HAP-Z1ES.  Used it to feed analog into my pre-amp; now using its digital USB output to feed my Devialet 200.  Truly happy with it.
Alas: this week, with my latest MacBookPro software upgrade (MacOS 11.3.1, an update to Big Sur) I can no longer transfer files (using the HAP Music Transfer app) from the laptop to the Sony.  I get error messages, either "Some files are failed in transferring. Please check the transferred file list." or "Transfer cannot start because the device has not been ready for it."  (I've never gotten either of these before.) 

I pinged Sony via Twitter but don't really expect an answer.

Everything else (playing existing files; using the HAP app on my phone as a remote) works fine.

Thanks in advance for any Audiogoner who has advice, diagnostics, workaround.
Ag insider logo xs@2xhrodman
@cleeds,

Last year I spoke with Sony Tech and was told that the HAP is being phased out and that there would not be any more firmware updates.
I spoke with Sony's ES division this morning.  They said they were aware of the issue; that a security patch associated with an update to Big Sur is what broke the connectivity between the MacOS and the HAP-Z1ES; and that as soon as they can isolate the specific problem, they will work on and issue a firmware update to the HAP-Z1ES and/or a software update to the Mac HAP Music Transfer App.No sense of when that will be, other than they are on the case.
Thanks for the info, I've just spent the last hour or so trying to figure out why my unit wasn't showing up on the network after trying to transfer some music via the sony app on wifi which usually works fine.  Fingers crossed that a fix is not too far away !!   Cheers
With you on that, Nikonnick!
First one to hear of an update tells the rest of us, ok?
Thanks,
    Howard.
I "chatted" with Sony service in the US today and got this reply.

"I truly understand, I have been researching this information for you and yes Sony is currently working on a patch for it to isolate this issue that occurred due to the Apple Software Update
I cannot assure you a specific time and date, but what I can be able to do for you is provide you the ES Department phone contact information (877) 619-7669, operating hours: Mon – Fri, from 9:00 am to 8:00 pm ET"
I'm not in the US and was wondering if someone there wanted to try their luck and advise the result?
Cheers
Nick